Impulse-valve.



J. D. 'GLAY.

IMPULSE VALVE. I APPLICATION FILED 00124, 1912.

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J. D. CLAY.

IMPULSE VALVE.

APPLICATION FILED 001224, 1912.

1,065,220, Patented June 17, 1913.

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WITNESSES I N V N70 R flQmq awhfl Joseph ncu JOSEPH D. CLAY, F ENOLA,PENNSYLVANIA.

IMPULSE-VALVE.

Specification of Letters Patent.

Patented June 17, 1913.

. Application filed October 24, 1912. Serial No. 727,613.

To all whom it may concern Be it known that I, JOSEPH D. CLAY, citizenof the United States, residing at Enola, in the county of Cumberland andState'of Pennsylvania, have invented certain new and useful Improvementsin Impulse- Valves, of which the'following' is a specification,reference being had therein to the accompanying drawing.

This invention relates to impulse Valves and'has for its object theproduction of an efiicient mechanism for preventing the escape of air ina train pipe in case the pipe should become broken at any point alongits line.

Another object of this invention is the production of a simple andetficient valve mechanism which will allow sufiicient air to passtherethroughto operate the brakes under ,ordinary circumstances, butwhich will automatically cut off the usual flow of air through the valvein case the train pipe should become broken at any point along its line.a

WVith these and other objects in view this invention consists in certainnovel combinations, constructions, and arrangement 01 parts as will behereinafter fully described and claimed.

In the accompanying drawings :F igure 1 is a central longitudinalsectional view of the valve. Fig. 2 is a central longitudinal sectionalview of the valve showing the same in its closed or thrown position.Fig. 3 is a' section taken on the linev33, of Fig. 2. Fig. 4 is asection taken on the line 44, of Fi 1. s v

y referring to the drawings by numerals it will be seen that 1designates the casing of the valve which is provided with the primary'compartment 1 and an auxiliary compartment 2. A valve containingcompartment 3 is also formed in the casing 1 of the valve, and apartition 4 is formed Within the valve and separates the compartments 1and 2. A partition 5 extends vertically of the valve casing l .andseparates the compartment 1 from the compartment 3. A partition 6 isalso formed in the valve to close the rear endof the compartment 2, andthis partition 6 terminates in an upwardly ex-'.

tending apertured partition7 through which partition 7 passes thecylindrical valve 8. An aperture 9 is also formed in the partition 5through which the cylindrical valve 8 passes. An aperture 10 is alsoformedin the partition 5 near its lower end through which the air isadapted to pass into the compartment 3. A thickened portion 11 is formedupon the partition 6 and constitutes a stop for limiting the slidingmovement of the cylindrical valve in one direction. An air inlet opening12 is formed near the rear end of the casing 1 to which is adapted to beattached the train pipe. A drain aper ture 13 is formed near the bottomof the compartment l and this aperture 13 is normally sealed by means ofa threaded cap 14 as illustrated in Fig. 1.

A projecting aperture collar 15 is formed upon the upper face of thevalve casing 1 and the aperture of this collar 15 is closed by means ofa cap 16, which cap is threaded upon the upper end of the collar 15. Itwill be seen that the aperture 17 formed in the collar 15 willfacilitate access to the interior of the valve mechanism. An aperture 18is formed .in the partition 4 near its front end, and through thisaperture is passed a funnel 19 for directing air from the compartment 2into the discharge end 20 of the casing 1. The discharge end 20 of thecasing 1 is internally threaded as at 21 for receiving the externallythreaded Washer 22, which washer is provided with a plurality ofapertures 23 for allowing the passage of air through this washer. Thewasher 22 is provided with a rearwardly extending integral collar 24,

which collar passes over the stem 25 of the valve mechanism hereinafterdescribed.-

A plunger head 26 is carried by the stem 25 and is also secured to aconnecting rod 27, which rod engagesv the collar 28 of the plunger head26 and the valve member 8. The collar 24 is freely slidable upon thestem 25 so as to allow the plunger head 26 to have free sliding movementrelative to the valve casing 1. It will, therefore, be seen that thewasher 22 may be adjusted longi tudinally of the casing 1 if so desired.

A longitudinallyextending slot or groove 29 is formed upon the underface of the partition 4 and is slightly longer than the relative lengthof the plunger head 26. The rear end of the plunger head 26 is normallypositioned so as to extend. beyond the rear end of the slot 29 so as toprevent the pas- "sage' of air through the compartment 3 into thedischarge end 20. When the train line pipes are filledwith air ready forservice theair pressure on each side of plun er head 26 is equal. Then,if there is any isconnection of train line pipe, due to burst ing of theair hose or other cause, the pressures on opposite sides of plunger head26 become unequal, causing plunger head 26 to be forced-against thespring 2% and assuming the position shown in Fig. 2, thereby allowingthe air to pass from the com partment 1 to the compartment 3, throughthe slot 29, through the apertures 23 formed in the washers 22 and therebe discharged out through the discharge end 20 of the casing 1. It will,therefore, be seen that the air pressure will not escape and cause theinstantaneous application of the brakes as heretofore, causing loss oflife and destruction of property. In caseithe throw valves or othermechanism communicating with the train pipe line should become injuredor broken the valve 8 would slide to the position as shown in Fig. 2,and since-the rear end of the valve is closed the air will b-e-preventedfrom passing into the compartment Qatits full pressure as usual. Ofcourse, it should be understood that in the structure as illustrated inFig. l the air can pass through the compartment 1 through thecompartment 2 and through the funnel 19 into the discharge end 20.

Having thus described the invention what is claimed as new, is

A valve of the class described comprising a casing, said casingcomprising a primary compartment and an auxiliary compartment, a valvecontaining compartmentadjacent said primary and auxiliary compartments,a valve slidably mounted Within said primary compartment and said valvecontaining compartment, a partition separating said primary andauxiliary compartments and also separating said auxiliary compartmentfrom said valve containing compartment and rovided with a longitudinallyexten ing groove upon its under face, said valve provided with a plungerhead, spring means exerting a rearward pressure upon said plunger head,aguiding pin, a washer adjustably secured within said valve containingcompartment and provided with a rearwardly extending sleeve, said pinworking within said sleeve, said longitudinally extending groove beinglonger than the relative length of said plunger head for facilitatingthe passage of air through said groove when said plunger head is broughtto a position centrally of said groove, said valve provided withlongitudinally extending slots for normally facilitating the passage ofair through said slots from said primary compartment to said auxiliarycompartment, and a discharge funnel communicating with said auxiliarycompartment and said valve containing compartment for allowing thepassage of air in ordinary circumstances from said auxiliary compartmentto the discharge end of said casing.

In testimony whereof I hereunto affix my signature in presence of twowitnesses,

JOSEPH D. CLAY.

\Vitnesses G. E. SHINTON, A. L. MILLER.

